package servlet;

import db.DB;
import model.purchase_list_goods;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/deleteplistgood")//访问的时候给一个地址,高于3.0版本的包才能这么配地址
public class deleteplistgood extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        resp.setHeader("content-type","text/html;charset=utf-8");
        int plistid=Integer.parseInt(req.getParameter("listid"));
        int goodid=Integer.parseInt(req.getParameter("goodid"));

        HttpSession session=req.getSession();

        DB DB=new DB();
        int num = DB.checkpurchasestock(plistid,goodid);
        if(num>=0){
            DB.deleteplistgood(plistid,goodid);//删除商品订单
            DB.editgoodstock(goodid,num);//更新库存
            DB.updateplist(plistid);//更新订单价格
        }
        else{
            String message = "退货失败！可能原因：商品库存不足";
            session.setAttribute("message",message);
        }

        if(Integer.parseInt(req.getParameter("whichpage"))==2){
            session.setAttribute("buypage","showlist2");
        }
        else{
            session.setAttribute("buypage","createlist2");
        }
        resp.sendRedirect("buysystem.jsp");

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req,resp); }
}

